It is the most joyful news we can receive—our Creator has become one of us! In all of our scrambling for the perfect gift, we should remember that, no matter what, the perfect Christmas gift comes to us every year. Jesus Christ becomes one of us so that we can partake in his divine nature (2 Peter 1:4), and so we can truly learn what it means to be human.
The truth is that only in the mystery of the incarnate Word does the mystery of man take on light. For Adam, the first man, was a figure of Him Who was to come, namely Christ the Lord. Christ, the final Adam, by the revelation of the mystery of the Father and His love, fully reveals man to man himself and makes his supreme calling clear.
(Gaudium et Spes 22)
In this the love of God was made manifest among us, that God sent his only-begotten Son into the world, so that we might live through him. (1 John 4:9)